The Broadcast actually didn't end holy shit
At this point everyone in the world has to ask themselves what on earth this old motherfucker wants from them.
He basically told them that the world is sinking, that some war happened in the past where he doesn't know who was good and who was evil and that some bad ancient weapons exist that could cause serious trouble.
All that without adding any kind of context.
Imagine you are a random citizen yourself and this happens.
You would ask yourself: "Well, and what should I do now? What is his point exactly?"